Bohr model and Matter wave: Difference between pages

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In [[quantum mechanics]], a branch of [[physics]], the '''Bohr model''' is the model of the [[atom]] proposed by [[Niels Bohr]]. Bohr's model is useful only when discussing the behavior of a [[hydrogen atom]]. Bohr's model is extremely useful in describing the hydrogen [[emission spectrum]].
{{Merge to|Wave-particle duality|discussion=Talk:Wave-particle duality|date=March 2013}}


== Electrons ==
In [[quantum mechanics]], a branch of [[physics]], a '''matter wave''' is when you think of [[matter]] as a [[wave]]. The concept of matter waves was first introduced by [[Louis de Broglie]]. Matter waves are hard to visualize, because we are used to thinking of matter as physical object. De Broglie revolutionized quantum mechanics by producing the equation for matter waves.


=== Energy Levels ===
== Wavelength of Matter ==
[[File:Bohr-atom-PAR.svg|Thumb|right| The Bohr model gives the specific energy levels of an electron (n=1,2,3)]]
Based on the fact that light has a wave-particle duality, De Broglie showed that matter might exhibit wave-particle duality as well (simply meaning that matter is made of both particles and waves). Basing his formula on earlier formulas, he arrived at the equation below.


The Bohr model says that the [[angular momentum]] of an [[electron]] within a hydrogen atom can only be [[integer]] multiples of a certain number.
<math>\lambda=\frac{h}{mv}</math>


:<math>L=n\frac{h}{2\pi}</math>
Where [[λ]] is the [[wavelength]] of the object, ''h'' is [[Planck's constant]], ''m'' is the mass of the object, and ''v'' is the [[velocity]] of the object. An alternate but correct version of this formula is


Where ''h'' is [[Planck's constant]], π is [[pi]], and ''n'' is the multiples (1,2,3,...). This formula says that an electron will only be found on the energy levels predicted by the formula, and not anywhere in between. This means that if an electron jumps from one energy level to the next, it will never be in between energy levels, but will instantaneously be transported from one level to the other.
<math>\lambda=\frac{h}{p}</math>


=== Light ===
Where ''p'' is the [[momentum]]. (Momentum is equal to mass times velocity). These equations merely say that matter exhibits a particle-like nature in some circumstances, and a wave-like characteristic at other times. [[Erwin Schrödinger]] created an advanced equation based on this formula and the [[Bohr model]], known as the [[Schrödinger equation]].  
Bohr's model is also useful because it explains the cause of [[light]]. Bohr agreed with classical theory that light has a wave-particle duality (meaning that it is made of both [[electromagnetic waves]] and particles called [[photons]]), but he said that light was given off when an electron in a hydrogen atom jumps from a higher energy level to a lower one. Basically, if an electron with ''x'' amount of energy goes to a lower state of energy and loses ''y'' energy, then a photon with energy ''y'' is emitted by the atom and either becomes light or some other form of [[radiation]].


== Related pages ==
== Related pages ==
*[[Quantum mechanics]]
*[[Quantum mechanics]]
*[[Emission spectrum]]
*[[Wave-particle duality]]




[[Category:Wave physics]]
[[Category:Quantum mechanics]]
[[Category:Quantum mechanics]]

Latest revision as of 10:27, 15 May 2017

Template:Merge to

In quantum mechanics, a branch of physics, a matter wave is when you think of matter as a wave. The concept of matter waves was first introduced by Louis de Broglie. Matter waves are hard to visualize, because we are used to thinking of matter as physical object. De Broglie revolutionized quantum mechanics by producing the equation for matter waves.

Wavelength of Matter

Based on the fact that light has a wave-particle duality, De Broglie showed that matter might exhibit wave-particle duality as well (simply meaning that matter is made of both particles and waves). Basing his formula on earlier formulas, he arrived at the equation below.

[math]\displaystyle{ \lambda=\frac{h}{mv} }[/math]

Where λ is the wavelength of the object, h is Planck's constant, m is the mass of the object, and v is the velocity of the object. An alternate but correct version of this formula is

[math]\displaystyle{ \lambda=\frac{h}{p} }[/math]

Where p is the momentum. (Momentum is equal to mass times velocity). These equations merely say that matter exhibits a particle-like nature in some circumstances, and a wave-like characteristic at other times. Erwin Schrödinger created an advanced equation based on this formula and the Bohr model, known as the Schrödinger equation.

Related pages